As early as 1990 the countries that participate in the Amazonian Cooperation Treaty had recommended expanding the Canaima National Park southward to connect it with Monte Roraima National Park in Brazil, with coordinated management of tourism, research and conservation.[1] In 1994, the Canaima National Park was named a World Heritage Site by UNESCO, as a natural reserve that has abrupt relief special and unique around the world, the tepuis.

Canaima National Park is the second largest park in Venezuela, after Parima-Tapirapecó, and sixth biggest national park in the world. It is the size of Belgium or Maryland.

About 65% of the park is occupied by plateaus of rock called tepuis, which are a kind of table-top mountain millions of years old, with vertical walls and almost flat tops. These constitute a unique biological environment and are also of great geological interest. Their sheer cliffs and waterfalls (including Angel Falls, which is the highest waterfall in the world, at 1,002 metres (3,287 ft)) create spectacular landscapes. The most famous tepuis in the park are Mount Roraima, the tallest and easiest to climb, and Auyantepui, the site of Angel Falls. The tepuis are sandstone and date back to a time when South America and Africa were part of a super-continent.

The park is home to indigenous Pemon Indians, part of the Carib linguistic group. The Pemon have an intimate relationship with the tepuis, and believe they are the home of the 'Mawari' spirits. The park is relatively remote, with only a few roads connecting towns. Most transport within the park is done by light plane from the airstrips built by various Capuchin missions, or by foot and canoe. Pemons have developed some basic and luxurious camps, which are mainly visited by tourists from across the world.

The park includes the entire watershed of the right bank of the Caroní River, and two of the highest waterfalls in the world, the Angel Falls and the Kukenán and plenty of waterfalls of lower altitude.

The only form of relief are the tepuis, that are plateaus which are unique features, among which are its vertical and nearly flat tops, although there are several tepuies that do not meet these rules. Geologically are remnants of a sedimentary cover composed of very ancient sandstone that is superimposed on a base of igneous rocks (mainly granite) that is even older (nearly 3 billion years). On its summit is home to a very substantial amount of very specific endemic species, both plant and animal. Some endemic plant species are categorized as "carnivorous", which are thus the food supply (mainly insects) that are so scarce in the mountains. These have a geological formations ranging between 1.5 and 2 billion years, which makes them one of the oldest formations in the world. The best known tepuies are: the Auyantepuy (where it follows the Angel Falls), the Roraima, the Kukenan and the Chimantá among many others.

Canaima National Park is spread in south-eastern Venezuela along the border between Guyana and Brazil. The best-known feature of Canaima National Park are its characteristic flat-topped mountain formations known as 'tepuis' which cover roughly 65% of the park. The tepuis constitute a unique biogeological entity and are of great geological interest.